Hoka He, I'am with most here... winterize! If you are uncomfortable, perhaps someone in campground or someone you know, can help you
Drain Water heater - remove outside vent cover, pull drain at bottom of tank. You will need a ratchet , extension, and sockets ( you should have these anyway for use on road)
Bypass heater - probably under kitchen sink area
Blow-out lines - probably can rent a "pancakeair compressor" for near nothing locally. Adjust pressure regulator on compressor to "under" 45 psii. Open each and every faucet, one at a time. Don't forget to blow thru toilet flush and also the rinse hose
Antifreeze - pour the "pink stuff"" into all drains
Good Luck